duete; see due, ty 2 ]. syn: duty, obligation refer to something a person feels bound to do. A duty often applies to what a person performs in fulfillment of the permanent dictates of conscience, piety, right, or law: one's duty to tell the truth; a parent's duty to raise children properly.
Mutations in the RB1 gene are responsible for most cases of retinoblastoma. RB1 is a tumor suppressor gene, which means that it normally regulates cell growth and keeps cells from dividing too rapidly or in an uncontrolled way.
Retinopathy, arteriosclerotic: Changes in the retina that occurs because of arteriosclerosis which involves hardening of the arteries.More detailed information about the symptoms, causes, and treatments of Retinopathy, arteriosclerotic is available below.esearch the causes of these diseases that are similar to, or related to, Retinopathy, arteriosclerotic: 1  Diabetic retinopathy. 2  Hypertensive retinopathy. 3  Central retinal artey occlusion. 4  Central retinal vein occlusion.